FEATURES

► Integration of an upconverter (a transmitter), a downconverter (a

receiver), and an LO chain with options of a 2× or 4× multiplier in

one chip

► RF frequency range: 24 GHz to 29.5 GHz

► Optional on-chip RF switch port between the transmitter and the

receiver

► LO input frequency range: 8 GHz to 15 GHz for x2 mode, 5 GHz

to 7.5 GHz for x4 mode

► 2 operation modes for both upconverter and downconverter

► Direct conversion of differential baseband I/Q (baseband

mode)

► Complex IF operation with optional on-chip hybrid (IF mode)

► Programmable baseband output common-mode voltage from 0.7

V to 1.5 V in receive mode, set via either SPI or physical pin

► Programmable mixer gate voltage to accommodate baseband

input common-mode from 0 V to 1.5 V in transmit mode

► Matched, 50 Ω impedance, single-ended RF input and output,

and RF switch port

► Matched, 50 Ω impedance single-ended LO input

► Low phase variation vs. gain control

► Upconversion mode

► Sideband rejection and carrier feedthrough optimization

► Envelope detector for LO feedthrough calibration

► Downconversion mode

► Image rejection and I/Q imbalance optimization

► Baseband I/Q dc offset correction

► Receiver mixer power detector for receiver gain setting

► LO chain features

► Variable gain to accommodate the various LO input levels

► 360° phase control shifter for LO synchronization

► Programmable LO harmonic reject filter

► I/Q phase correction

► Fast TDD switching time via external pins

► Calibration probes for array calibration

► Programmable via a 3-wire or 4-wire SPI, compatible with

ADMV4828 interface

► 6 mm × 6.5 mm, BGA package (see the Outline Dimensions

section)

APPLICATIONS

► Millimeter-wave 5G applications

► Point to point microwave radios

► Radar and electronic warfare systems

► Instrumentation and automatic test equipment (ATE)

GENERAL DESCRIPTION

The ADMV1128A is a silicon on isolator (SOI), microwave, upconverter and downconverter optimized for 5G radio designs operating in the 24 GHz to 29.5 GHz frequency range.

Both upconverters and downconverters offer two modes of frequency translation. One mode is conversion from and/or to single-ended

or complex intermediate frequency (IF) signals, which then pass

through an on-chip 90° IF hybrid, known as IF mode.

The other mode is a direct conversion from and/or to differential

baseband inphase/quadrature (I/Q) inputs and outputs, known as

baseband mode. The I/Q baseband output common-mode voltage

is programmable between 0.7 V and 1.5 V.

When the device is used as an image rejecting downconverter,

the unwanted image term is typically rejected to 24 dBc, before

calibration. The ADMV1128A offers a square law power detector

to allow monitoring of the power levels at the mixer inputs of the

downconverter.

The RF receive input, RF transmit output, and local oscillator (LO)

interface are all single-ended and matched to 50 Ω. The on-chip RF

switch provides the option to combine the transmit and receive RF

ports together for time division duplex (TDD) applications.

The serial port interface (SPI) provides adjustment of the quadrature phase to allow optimum sideband rejection. In addition, the

SPI allows powering down the output envelope detector to reduce

power consumption when carrier feedthrough optimization is not

necessary.

The ADMV1128A upconverter and downconverter is housed in a

compact, thermally enhanced, 6 mm × 6.5 mm, ball grid array

(BGA) package. This BGA package enables the ability to heat sink

the ADMV1128A from the top of the package for the most efficient

thermal heat sinking. The ADMV1128A operates over the −40°C to

+95°C TC range.

Throughout the figures within this data sheet, Rx means receiver

and Tx means transmitter.